package servlet;

import db.MysqlAdapter;
import java.io.IOException;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author 490501 Servlet håndterer alle operasjoner som er knyttet til
 * brukerbehandling slike som: regisrering av nye brukere, pålogging
 */
@WebServlet(name = "User", urlPatterns = {"/User"})
public class User extends HttpServlet {

    MysqlAdapter ms = new MysqlAdapter();

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        if (request.getParameter("mode") == null) {
            response.sendError(501, "mode is not set");
        }
        if (request.getParameter("mode").equals("register")) {
            if (request.getParameter("name") == null
                    || request.getParameter("pass") == null
                    || request.getParameter("email") == null) {
                response.sendError(501, "required information missed");
            }
            try {
                ms.addUserToDataBase(request.getParameter("name"), request.getParameter("mail"), request.getParameter("pass"));
                response.sendRedirect("login.jsp");
            } catch (Exception ex) {
                response.sendError(500, "something går weird: " + ex.getMessage());
                Logger.getLogger(User.class.getName()).log(Level.SEVERE, null, ex);
            }
        } else if (request.getParameter("mode").equals("login")) {
            if (request.getParameter("name") == null
                    || request.getParameter("pass") == null){
                response.sendError(501, "required information missed");
            }
            try {
                int id = ms.autentificateUser(request.getParameter("name"), request.getParameter("pass"));
                request.getSession(true).setAttribute("id", id);
                request.getSession(true).setAttribute("username", request.getParameter("name"));
                response.sendRedirect("index.jsp");
            } catch (SQLException ex) {
                response.sendError(500, "something går weird: " + ex.getMessage());
                Logger.getLogger(User.class.getName()).log(Level.SEVERE, null, ex);
            }
        } else if (request.getParameter("mode").equals("logout")) {
            request.getSession().invalidate();
            response.sendRedirect("index.jsp");
            
        }

    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
